package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeEditPassword;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO 员工登录时传递的数据模型
     * @return employee类
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 对前端传入的代码进行MD5加密处理
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO 新增-修改员工传递的数据模型
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        // 1、创建员工实体类
        Employee employee = new Employee();
        // 2、将employeeDTO中的属性拷贝给employee实体类
        BeanUtils.copyProperties(employeeDTO, employee);
        // 3、完善employee实体类中密码
        if (employeeDTO.getPassword() == null && employeeDTO.getRePassword() == null && employeeDTO.getPassword().equals(employeeDTO.getRePassword())){
            throw new PasswordErrorException(MessageConstant.REPASSWORD_ERROR);
        }
        employee.setPassword(DigestUtils.md5DigestAsHex(employeeDTO.getPassword().getBytes()));
        // 3、完善employee实体类中状态，1表示启用，0表示禁用
        employee.setStatus(StatusConstant.ENABLE);
        // 4、设置employee实体类中的创建时间，修改时间
//        employee.setCreateTime(LocalDateTime.now());
//        employee.setUpdateTime(LocalDateTime.now());
        // 5、设置employee实体类中的创建人，修改人
        // 获取当前登录用户的id
//        employee.setCreateUser(BaseContext.getCurrentId());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        // 6、调用employeeMapper的save方法保存数据
        employeeMapper.save(employee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO 员工分页查询接口类
     * @return PageResult——total records
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // 1、创建分页查询框架
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total, records);
    }

    /**
     * 启用禁用员工账号
     * @param status 状态 1表示启用，0表示禁用
     * @param id 员工id
     */
    public void StartOrStop(Integer status, Long id) {
        // 1、用employee实体类来封装信息
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
//                .updateTime(LocalDateTime.now())
//                .updateUser(BaseContext.getCurrentId())
                .build();
        employeeMapper.updata(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id 员工id
     * @return employee类
     */
    public Employee getByid(long id) {
        Employee employee = employeeMapper.getByid(id);
        employee.setPassword("****");
        return employee;
    }

    /**
     * 根据id修改员工信息
     * @param employeeDTO 新增-修改员工传递的数据模型
     */
    public void updata(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());
        employeeMapper.updata(employee);
    }

    @Override
    public void editPassword(EmployeeEditPassword employeeEditPassword) {
        // 检测旧密码是否相同
        String OldPassword = DigestUtils.md5DigestAsHex(employeeEditPassword.getOldPassword().getBytes());
        Long id = BaseContext.getCurrentId();
        Employee employee = employeeMapper.getByid(id);
        if (!OldPassword.equals(employee.getPassword())) {
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        employee.setPassword(DigestUtils.md5DigestAsHex(employeeEditPassword.getNewPassword().getBytes()));
        employeeMapper.updata(employee);
    }

}
